sources tell us that law enforcement officials knew within 24 hours that this was a terror attack. our reporting also reveals that even though the administration says the investigation is going smoothly, the fbi has hit a bump in the road to the crime scene and tonight, we've got reporting that could explain why that is. a senior law enforcement official telling fran townsend the fbi wanted the u.s. military to provide perimeter support in benghazi, protection, in other words, but that request was not granted. fran's a former white house homeland security advisor. she served in the george w. bush administration, currently she sits on the cia external advisory panel and recently visited libya with her employer, mcandrews and forbes. also joining us, former fbi assistant director, tom fuentes, who has extensive experience investigating attacks on americans overseas, and former cia officer, bob baer. so fran, so the fbi sought military protection to go into benghazi. why didn't they get it? >> well, the answer to that question, i think, is not really clear. so it's not unusual, when you w